package org.zhucy;

import java.util.Optional;

/**
 * Hello world!
 *
 */
public class App 
{
    public static void main( String[] args )
    {
        String text = "234";
        Optional.ofNullable(text).ifPresent(System.out::println);
        //System.out.println( "Hello World!" );
    }
}
